:root {
  color-scheme: dark;
  --bg: #050a18;
  --surface: rgba(18, 28, 55, 0.66);
  --surface-solid: #101a35;
  --text: #f5f7ff;
  --muted: #aab4ce;
  --line: rgba(181, 197, 255, 0.16);
  --blue: #5ea1ff;
  --violet: #9675ff;
  --cyan: #62d8ff;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  background:
    radial-gradient(circle at 78% 10%, rgba(76, 80, 235, 0.24), transparent 32rem),
    radial-gradient(circle at 12% 32%, rgba(37, 153, 255, 0.12), transparent 28rem),
    var(--bg);
  line-height: 1.55;
}

a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
.site-header, main, footer { width: min(1160px, calc(100% - 40px)); margin-inline: auto; }

.site-header {
  height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 720; letter-spacing: -0.02em; }
.brand img { border-radius: 9px; box-shadow: 0 8px 24px rgba(33, 74, 220, 0.3); }
.header-actions { display: flex; align-items: center; gap: 20px; }
.language-switch { display: flex; padding: 3px; border: 1px solid var(--line); border-radius: 999px; background: rgba(255,255,255,0.04); }
.language-switch button {
  border: 0;
  border-radius: 999px;
  padding: 6px 11px;
  color: var(--muted);
  background: transparent;
  font: inherit;
  font-size: 0.82rem;
  cursor: pointer;
}
.language-switch button[aria-pressed="true"] { color: var(--text); background: rgba(255,255,255,0.13); }
.github-link { display: flex; gap: 5px; color: var(--muted); text-decoration: none; font-size: 0.9rem; }
.github-link:hover { color: var(--text); }

.hero {
  min-height: 690px;
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  gap: 64px;
  align-items: center;
  padding: 64px 0 92px;
}
.eyebrow { margin: 0 0 18px; color: var(--cyan); font-size: 0.76rem; font-weight: 760; letter-spacing: 0.18em; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 24px; max-width: 700px; font-size: clamp(3.4rem, 6vw, 6.2rem); line-height: 0.98; letter-spacing: -0.065em; }
.hero-description { max-width: 640px; margin-bottom: 34px; color: var(--muted); font-size: clamp(1.05rem, 1.7vw, 1.3rem); line-height: 1.7; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 17px; }
.download-button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 52px;
  padding: 0 20px;
  border: 1px solid rgba(255,255,255,0.24);
  border-radius: 14px;
  color: white;
  background: linear-gradient(135deg, #347cff, #795cff);
  box-shadow: 0 14px 38px rgba(70, 81, 241, 0.32), inset 0 1px rgba(255,255,255,0.25);
  text-decoration: none;
  font-weight: 700;
  transition: transform 180ms ease, box-shadow 180ms ease;
}
.download-button:hover { transform: translateY(-2px); box-shadow: 0 18px 44px rgba(70, 81, 241, 0.42), inset 0 1px rgba(255,255,255,0.28); }
.download-button:focus-visible, button:focus-visible, a:focus-visible { outline: 3px solid var(--cyan); outline-offset: 3px; }
.download-icon { font-size: 1.25rem; line-height: 1; }
.release-note, .requirements { color: var(--muted); font-size: 0.85rem; }
.requirements { margin: 20px 0 0; max-width: 520px; }

.product-visual { position: relative; min-height: 560px; display: flex; align-items: flex-end; justify-content: center; }
.ambient-glow { position: absolute; inset: 8% 2% 4%; border-radius: 50%; background: radial-gradient(circle, rgba(79, 115, 255, 0.34), transparent 67%); filter: blur(20px); }
.app-icon { position: absolute; z-index: 2; top: 8px; right: 4%; border-radius: 38px; box-shadow: 0 28px 70px rgba(19, 34, 138, 0.55); transform: rotate(3deg); }
.window-card { position: relative; z-index: 1; width: min(430px, 92%); padding: 11px; overflow: hidden; border: 1px solid rgba(205, 219, 255, 0.2); border-radius: 28px; background: rgba(217, 226, 255, 0.1); box-shadow: 0 40px 90px rgba(0,0,0,0.5); backdrop-filter: blur(24px); transform: perspective(900px) rotateY(-5deg) rotateX(2deg); }
.window-card img { display: block; width: 100%; height: auto; border-radius: 18px; }
.window-bar { height: 25px; display: flex; gap: 6px; align-items: center; padding-left: 7px; }
.window-bar i { width: 7px; height: 7px; border-radius: 50%; background: rgba(255,255,255,0.35); }

.features { padding: 98px 0; border-top: 1px solid var(--line); }
.section-heading { display: grid; grid-template-columns: 0.42fr 1fr; align-items: end; margin-bottom: 46px; }
.section-heading .eyebrow { margin-bottom: 8px; }
h2 { margin-bottom: 0; font-size: clamp(2rem, 4vw, 3.6rem); line-height: 1.08; letter-spacing: -0.045em; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.feature-grid article { padding: 32px 30px 36px; border-right: 1px solid var(--line); }
.feature-grid article:first-child { padding-left: 0; }
.feature-grid article:last-child { border-right: 0; padding-right: 0; }
.feature-number { color: var(--blue); font-size: 0.78rem; font-weight: 760; }
.feature-grid h3 { margin: 35px 0 12px; font-size: 1.35rem; }
.feature-grid p { margin-bottom: 0; color: var(--muted); font-size: 0.98rem; }

.install { display: grid; grid-template-columns: 0.75fr 1.25fr; gap: 80px; align-items: start; padding: 100px 0; }
.install ol { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.install li { display: grid; grid-template-columns: 42px 1fr; gap: 15px; align-items: center; padding: 22px 0; border-bottom: 1px solid var(--line); }
.install li span { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; color: var(--cyan); background: rgba(98,216,255,0.1); font-size: 0.82rem; font-weight: 750; }
.install li p { margin: 0; font-size: 1.04rem; }

.final-cta { display: grid; grid-template-columns: auto 1fr auto; gap: 24px; align-items: center; padding: 32px; border: 1px solid var(--line); border-radius: 26px; background: linear-gradient(130deg, rgba(44,81,160,0.25), rgba(66,37,125,0.26)); box-shadow: inset 0 1px rgba(255,255,255,0.08); }
.final-cta img { border-radius: 17px; }
.final-cta h2 { margin-bottom: 5px; font-size: clamp(1.35rem, 2.4vw, 2rem); }
.final-cta p { margin: 0; color: var(--muted); }
.download-button.compact { min-height: 46px; padding-inline: 17px; }

footer { display: flex; justify-content: space-between; gap: 24px; padding: 54px 0 36px; color: var(--muted); font-size: 0.84rem; }
footer p { margin: 0; }
footer a { color: var(--text); text-decoration-color: rgba(255,255,255,0.35); text-underline-offset: 3px; }

@media (max-width: 820px) {
  .site-header, main, footer { width: min(100% - 28px, 680px); }
  .site-header { height: 70px; }
  .github-link span:first-child { display: none; }
  .hero { grid-template-columns: 1fr; gap: 20px; padding: 68px 0 72px; }
  h1 { font-size: clamp(3rem, 13vw, 5rem); }
  .product-visual { min-height: 520px; }
  .app-icon { width: 132px; height: 132px; border-radius: 28px; right: 1%; }
  .section-heading, .install { grid-template-columns: 1fr; gap: 30px; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-grid article, .feature-grid article:first-child, .feature-grid article:last-child { padding: 28px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .feature-grid article:last-child { border-bottom: 0; }
  .feature-grid h3 { margin-top: 16px; }
  .final-cta { grid-template-columns: auto 1fr; }
  .final-cta .download-button { grid-column: 1 / -1; justify-content: center; }
  footer { flex-direction: column; }
}

@media (max-width: 480px) {
  .header-actions { gap: 10px; }
  .hero { padding-top: 46px; }
  .hero-actions { align-items: flex-start; flex-direction: column; }
  .download-button { width: 100%; justify-content: center; }
  .product-visual { min-height: 430px; }
  .window-card { width: 96%; border-radius: 22px; padding: 8px; }
  .app-icon { width: 104px; height: 104px; border-radius: 23px; }
  .features, .install { padding: 72px 0; }
  .final-cta { padding: 24px; }
  .final-cta img { width: 58px; height: 58px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .download-button { transition: none; }
}